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$61+ Cheap flights from Ontario to Austin (ONT - AUS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — AUS
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
1 adult, Economy
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Cheapflights Tip: The best prices from Ontario to Austin Bergstrom are usually found in April or September, booked 87 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from Ontario to Austin

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Austin (AUS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 2, 2025.

Round-trip from

$129
(Mytrip)

One-way from

$61
(Priceline)

Popular in

December

Cheapest in

April

Average price

$307

Good round-trip deal

$353 or less

Good one-way deal

$203 or less
From Ontario to Austin Bergstrom
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One-way flight from Ontario to Austin Bergstrom
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Highest demand for flights based on searches. 4% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Ontario to Austin Bergstrom.
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Price to beat on a one-way flight from Ontario to Austin Bergstrom.
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Find flight deals from Ontario to Austin

Cheapest flights from Ontario to Austin
Explore the most affordable flight options available from Ontario to Austin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2025.

This Mytrip deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/167:00 amONT - AUS
1 stop28h 04mFrontier
Tue 7/227:00 amAUS - ONT
1 stop18h 50mFrontier
Deal found 7/2$129
This American Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2812:22 pmONT - AUS
1 stop9h 13mAmerican Airlines
Tue 9/212:05 pmAUS - ONT
1 stop7h 47mAmerican Airlines
Deal found 6/30$243
This Southwest deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/411:05 amONT - AUS
Nonstop2h 50mSouthwest
Thu 9/114:45 pmAUS - ONT
Nonstop3h 00mSouthwest
Deal found 6/30$257

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Austin that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 2, 2025.
Use the filters below to find and compare flights from Ontario to Austin that are best for you.

Fly from

Ontario

Fly to

Austin

Route

Depart

Return

Price

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Wed 7/16

7:00 am-1:04 pm

1 stop28h 04m

Austin Bergstrom

Tue 7/22

7:00 am-11:50 pm

1 stop18h 50m

$129

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Thu 8/28

12:22 pm-11:35 pm

1 stop9h 13m

Austin Bergstrom

Tue 9/2

12:05 pm-5:52 pm

1 stop7h 47m

$243

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Thu 9/4

11:05 am-3:55 pm

Nonstop2h 50m

Austin Bergstrom

Thu 9/11

4:45 pm-5:45 pm

Nonstop3h 00m

$257

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Sat 9/6

8:00 am-3:27 pm

1 stop5h 27m

$61

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Fri 8/8

6:00 am-3:29 pm

1 stop7h 29m

$106

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Tue 11/18

6:47 am-4:43 pm

1 stop7h 56m

$127

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Wed 9/10

12:45 pm-5:35 pm

Nonstop2h 50m

$129

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Thu 10/23

7:10 am-4:43 pm

1 stop7h 33m

$131

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Tue 8/12

9:50 am-5:39 pm

1 stop5h 49m

$134

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Mon 9/8

6:50 pm-8:51 am

2 stops12h 01m

$139

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Best time to book a flight from Ontario to Austin

Have a flexible travel schedule? Discover the best time to fly to Austin from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Austin

How far ahead should I book a flight from Ontario to Austin?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Austin. Price data was last updated on June 27, 2025.

Booking 87 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Austin. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Ontario to Austin?

Currently, January is the cheapest month in which you can book a flight from Ontario to Austin (average of $286). Flying from Ontario to Austin in March is currently the most expensive (average of $362). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to AUS?

Find hourly flight availability from Ontario to Austin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 2, 2025.

It’s optimal to fly from Ontario to Austin in the evening. By choosing this option you can save up to 53% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from Ontario to Austin?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Austin. Price data was last updated on June 29, 2025.

Travelers seeking maximum savings on their Ontario to Austin flight should consider departing on Tuesday evenings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Austin

Get insights into the airlines that provide service to Austin. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Austin. Reviews last updated July 2, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from Ontario to Austin by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,272 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,975 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,861 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Austin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Ontario to Austin?

    If you wish to fly to Austin from Ontario, then you need to book flights from Ontario to Austin Bergstrom. There are 2 flights from Ontario (ONT) to Austin Bergstrom (AUS) per day to choose from. Flights to Austin from Ontario are available from 5 different airlines, which means you should have some options if you want to compare airfare deals. 2h 45m is how long a nonstop flight from Ontario to Austin Bergstrom typically takes.

  • How popular is this Ontario to Austin flight route?

    This flight path from Ontario to Austin Bergstrom was viewed by 11 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines flying from Ontario to Austin round-trip?

    Flying on Frontier is currently your cheapest option to Austin, with prices starting at $129. Additional round-trip tickets that might be worth considering are offered by American Airlines and Southwest, with the lowest prices starting at $243 and $257, respectively. Frontier is priced at 59% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Ontario to Austin one-way?

    One-way options have recently been found by users for as low as $61 on Frontier. Other airlines that offer cheap prices include American Airlines from $127 and Southwest from $129 one-way.

  • What are the cheapest flights from Ontario to Austin?

    Looking at all options, your cheapest flight can be booked for $158. While the most popular route (Ontario - Austin Bergstrom) can be booked for $217 on average our data indicates $320 when flying from Ontario to Austin.

  • Can I find deals for flights from Ontario to Austin that include hotel bookings?

    Yes. In addition to deals on Ontario to Austin flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Austin?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Austin.

  • Can I find deals for business class flights from Ontario to Austin?

    Yes. Cheapflights offers flight deals from Ontario to Austin by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Austin?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Austin (average of $286). Flying from Ontario to Austin in March is currently the most expensive (average of $362). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
San Marcos
Georgetown
Fredericksburg
Pflugerville
Dripping Springs
Cedar Park
Canyon Lake
Bastrop
Round Rock
Seguin
Horseshoe Bay

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Alternative routes for Ontario to Austin

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Ontario to Austin

Discover the top 5 airlines that operate flights from Ontario to Austin. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$118Average$200FlexibilityNo cancel feeOn-time62%
DeltaCheapest$120Average$369FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$216Average$388FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$231Average$356FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$256Average$387FlexibilityNo cancel feeOn-time69%

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